/Engine/Plugins/Enterprise/GLTFExporter/Source/GLTFExporter/Public/Json/GLTFJsonMaterial.h
struct FGLTFJsonPBRMetallicRoughness : public [IGLTFJsonObject](API\Plugins\GLTFExporter\Json\IGLTFJsonObject)
FGLTFJsonColor4
BaseColorFactor
FGLTFJsonTextur...
BaseColorTexture
float
MetallicFactor
FGLTFJsonTextur...
MetallicRoughnessTexture
float
RoughnessFactor